Compilare: user.cpp: In function ‘void read()’: user.cpp:60: warning: format ‘%ld’ expects type ‘long int’, but argument 3 has type ‘int’ user.cpp:63: warning: format ‘%ld’ expects type ‘long int’, but argument 3 has type ‘int’ user.cpp:66: warning: format ‘%ld’ expects type ‘long int’, but argument 3 has type ‘int’ user.cpp:52: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp:54: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp:56: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp:58: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result